https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98278
Bug ID: 98278
Summary: switch optimisation and -fstrict-enums
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: denis.campredon at gmail dot com
Target Milestone: ---
Created attachment 49761
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49761&action=edit
input file
The attached file, compiled with -O2 -fstrict-enums, only for `foobar` all
branches are transformed to a jump table.
If I did not made any mistake all the function should be able to be transformed
should produce the same assembly.
Changing the definition of the enum to
enum e { A = 1, B, C, D}; will produce worse code. Only one jumtable is
used/created.
enum e { A = 2, B = 4, C = 6, D = 8 }; (or any other sequence) no jump table is
created.
